Spray-burner.



F. CALDWELL.

SPRAY BURNER.

APPLICATION F-lLED JULY 13. 1914.

Patented Aug. 31, 1915.

INVLIEiITOR. I W-W A TTORQNEY.

FRANK CALDWELL, F CINCINNATI, OHIO.

SPRAY-BURNER.

Specification of Letters Patent.

Application filed July 13, 1914.. Serial No. 850,593.

To all whom it may concern Be itknown that I, FRANK CALDWELL, a cltizen of the United States, and a resident of Cineinnatnin the county of Hamilton and State of Ohio, have invented a certain new and useful Improvement in Spray- Burners, of which the following is a specification.

This invention relates to burners and more especially to those adapted for use as portable flame-sprays on railroads, highways and the like for destroying or removing rank-growth or vegetation, or for melting ice and snow or like obstructions along the track or roadway.

The details of structure will be fully hereinafter described and particularly pointed out inthe claims that follow.

In the accompanying sheet of drawings, Figure 1 is a perspective view of the burnerspray device embodying my invention herein; Fig. 2, a perspective view of the said burner-spray device but omitting its outer 1acket -chimney and Y-shape oil and air inlet; Fig. 3, an elevation showing the burner mounted on an extensible-arm that 1s adapted to be removably-mounted at the rear end or other desired part of the ma chlne truck for applying the burner-spray; Fig. 4, a perspective view of a bafiie-plate used in the exit or discharge end of the said burner; and Fig. 5, a perspective view of the said Y-shape inlet for the, mixing-coil that leads to the burner-spray or gas diffus- 1n device.

y-device is especially adapted for use on a truck or platform portably mounted on wheels and carrying a'propelling engine or motor of any suitable type or structure. The sa d engine may be dispensed with if electrio-trolleys are used to propel the machine along the track.

An oil-supply under compressed-air pressure is provided on the truck and is distributed by means of a pair of pipes (that ncludes a separate compressed-air pipe) into a Y- shaped inlet16 which surmounts a long vertical coil of pipe 17, the latter extending downwardly into a U-shaped bend 18 which thence extends into an inverted-U- shaped bend 19 of somewhat smaller radius than the bend 18, the last-named extension 19 then extending into a short vertical coil 20 that has an upright inverted-U-shaped extension 21 whose lower free end carries a hollow cap 22 that has projecting from it a plurality of nozzles. 23 of preferably a needle-spray type. Nozzles 23 lie within the last-named vertical coil 20, axially-centered therein as best seen in Fig.2 and with their lower spray ends at a lower level than the bottom of' 'said coil 20 for proper delivery of the aerated fluid-fuel into the lower end or bottom of an upright funnel-mouthed forced-draft tube 24 that is concentricallymounted within a surrounding jacket-chimney 25 that has a closed top 2.6 through which 'passes and is sustained the upper funnel-mouth air-inlet end of said draft-tube 24, as best seen in Fig. 1. The inner limb of the inverted- U shape extension passes through an opening near the top of the draft-tube and lies axially within the latter.

Patented Au 31, 1e15,

The lower end of the'inner draft-tube 2 l lies at the same level as that of the surround-Q ing jacket-chimney 25, with the inner-limb of the said U-shape bend 18 lying between the said draft-tube and said surrounding j acket-chimney, draft tube also lies concentrically .,within" the coil 20, as also best seen in Fig. 11 In Fig. 3 I show how the burner is mount ed at the outer end of a lazy-tongs orfex and said lower end of the tensible arm or bracket 27 w-hjose inner ndi has pivot-pins 28 of the carrier truck M tongs device enables a serles or row of'the that are adapted to engage suitable eyes or orificed lugs on the rearend or platform. This lazy spraying-burners to be extended to and from the rear end of the platform, either horizontally or at an inclination downwardly or upwardly, as OCCaSlOIl may require, and the coi 17 is made sufficiently flexible to allow for same.

The Y-shape inlets 16 have them a central dividing-llgament that extends al--- most the entire depth of each one, as best.

seen in Fig. ceives the force of the passing oil and cornpressed air at either side of itand serves as an internal bafile to direct the said oil and compressed air into the vertical coil 17 without any chance of their crossing each other or obstructing the onward path of the other, but at the same time permitting them to immediately mingle as soon as thelower end of the bafile is passed and thence into the coil 17 wherein the thorough and compressed air is effected.

' The U-shape bend 18 and the next inverted-U-shape bend 19 in each burner-coil form an effective trap to prevent back-firing 5. This dividing-ligament remixing of said oil in the fuel-coils and thereby provide a burner that is extremely safe and always in condition for use.

A baflle-plate 29, is suitably attached to the lower or exit end of each draft-tube 24 to divert the outward flow of gases ,underpressure toward the rear where combustion takes place, and a suitable flame projects from each burner-tube that is adapted to destroy rank-growth such like from a track or roadway, or be extremely useful in melting snow and ice along said track or roadway, as the case may be, to maintain the same open to passage and traflic.

The spray devices are ignited for service by means of a suitable torch, each spray being under control so that all or any reduced number of them can be utilized as required.

' It is obvious that upon by the spray can be removed and otherwise disposed of along the sides of the track or roadway as Well as within the longitudinal border of either.

It is obvious that the jacket-chimneys 25 and the'hinging or pivotal inner ends of the extensible-brackets 27 that support them use wheretrack-rails are charged with electricity and likely to short-circuit through metallic structures having no means of insulation.

I claim:

1. In a device of the character described, a burner or flame spray device comprising an upright fuel and air mixing-coil extending from a fuel-supply aving a U-shaped extension at its lower as weeds or the under pressure and end, an inverted-U-shaped extension leading from said U-shaped extension, an exterior tube or jacket-chimney, an internal drafttube concentrically-mounted within said jacketchimney, a coil within said jacketchimney and surrounding the internal drafttube near its lower end and having an inverted U-shaped upward-extension whose inner limb enters the draft-tube near its upper end, and a multiple-spray projecting downwardly from said inner limb of the inverted U-shaped extension that lies within the draft-tube.

2. In a device of the character described, a burner or flame spray device comprising an upright fuel and air mixing-coil, a Y- shape or bifurcated inlet for said mixingcoil, a U-shaped extension at the lower end of said mixing-coil, an inverted-U-shapcd extension leading from the said U-shaped extension and forming a trap to prevent back-firing, an exterior tube or jacket-chimney, an internal draft-tube within the said jacket-chimney, a coil leading from the said inverted-U-shaped extension and surrounding the said draft-tube near its lower end,

1 an inverted U-shaped extension leading from said last-named coil through the shell of the said internal draft-tube into axial relation within the same, a nozzle-spray attached to the lower end of the inner limb of the lastnamed U-shaped extension inside the said draft-tube, and a suitable baflie-plate mounted in the lower open end of the draft-tube and adapted to divert the gases emitting from the said nozzle-spray rearwardly for ignition and application or distribution in flame form.

FRANK CALDWELL. Witnesses:

CHARLES W.

AOKENI'IAUSEN, JOHN ELIAS J ONES. 

